Dorman 929-778 Leaf Spring Axle U-Bolt Kit - Front

Dorman 929-778 Leaf Spring Axle U-Bolt Kit

Dorman 929-778 is a universal leaf spring axle U-bolt kit for securing a leaf spring or leaf spring bundle to the underside of an axle on a vehicle or trailer. Built from steel with a semi-gloss black finish, it uses Grade 8 hardware with fine 5/8 in threads for a standard replacement application.

Use this kit when you need a direct hardware replacement for suspension service on leaf spring setups. The 6.5 in inside length and 3.063 in inside width help match the leaf spring stack and axle dimensions, while the 3 in thread length supports proper nut engagement. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Key Features

• Brand: Dorman
• Part number: 929-778
• Steel construction with semi-gloss black finish
• Grade 8 U-bolt hardware
• 5/8 in fine thread diameter
• 6.5 in inside length and 3.063 in inside width
• Standard replacement, universal fit
• Nuts included

Application Details

Compatible with leaf spring axle mounting service where the U-bolt dimensions match the axle and spring pack. For vehicle-specific search intent, this part is commonly researched for suspension repair on Ford F-150, Chevrolet Silverado, and Dodge Ram leaf spring axle U-bolt replacement needs, but final selection should be based on the measured spring and axle dimensions. Dorman 929-778 is also searched as a replacement option for trailer suspension hardware and other leaf spring axle clamp applications.

What It Helps Fix

• Loose or damaged leaf spring axle clamping hardware
• Corrosion-worn suspension fasteners
• Incorrect U-bolt length or thread engagement
• Leaf spring pack movement at the axle seat
• Hardware replacement during rear suspension service

Installation Notes

Measure the leaf spring stack, axle diameter, inside width, and inside length before ordering. Verify thread diameter, thread pitch, and thread length against the original hardware. Torque fasteners to the vehicle or trailer service specification after the suspension is loaded correctly.

Quality Assurance

Dorman supplies standard replacement suspension hardware engineered for service use. Part 929-778 is built with Grade 8 steel construction and fine-thread hardware for secure axle-to-spring clamping when the dimensions match the application.